Mobile touch device managers seem broken : No deviceSourceManagers available on mobile

Questions
1

Calling
const ds = this.deviceSourceManager.getDeviceSources(DeviceType.Touch);
or even
const ds = this.deviceSourceManager.getDeviceSources(DeviceType.Mouse);

both result in empty arrays.

Inspecting the deviceSourceManager object seems to imply there’s no devices :

image
image498×352 21.7 KB

Running Babylon.js Playground on mobile (chrome and firefox) both alert null.

I assume I’m doing something wrong as it’s unlikely input has broken this much on mobile, I’m just too tired to see exactly what :smiley:

2

cc @amoebachant

3

Taking a look…

4

It seems that, conceptually, a Touch ‘Device’ is only momentarily present when a touch is detected. I’m guessing if I touch the screen N times I’d temporarily see N touch devices too.

This works :

          let deviceSource: DeviceSource<any> = this.deviceSourceManager.getDeviceSource(DeviceType.Mouse);
          if (deviceSource == null) {
            deviceSource = this.deviceSourceManager.getDeviceSource(DeviceType.Touch);
          }

          if (deviceSource == null) {
            return;
          }

          const res = deviceSource.getInput(PointerInput.LeftClick);

Would be great to update the docs to make this explicit, are the docs open source too?

5

Yes, you’re right, touch devices are added on touch down and removed on touch up. An update to the docs would be very appreciated! Please feel free to do a PR in GitHub - BabylonJS/Documentation: Babylon.js's documentation website - thank you!